68773261 has 2 divisors, whose sum is σ = 68773262. Its totient is φ = 68773260.

The previous prime is 68773259. The next prime is 68773337. The reversal of 68773261 is 16237786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 396900 = 8269^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 68773261 - 2¹ = 68773259 is a prime.

It is a super-2 number, since 2×68773261² = 9459522857148242, which contains 22 as substring.

Together with 68773259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68773241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34386630 + 34386631.

It is an arithmetic number, because the mean of its divisors is an integer number (34386631).

Almost surely, 2^68773261 is an apocalyptic number.

It is an amenable number.

68773261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68773261 is an equidigital number, since it uses as much as digits as its factorization.

68773261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 68773261 is about 8292.9645483385. The cubic root of 68773261 is about 409.7068318654.

The spelling of 68773261 in words is "sixty-eight million, seven hundred seventy-three thousand, two hundred sixty-one".